//实现一个翻译服务器，客户端发送过来一个英语单词，返回对应汉语

#include<muduo/net/TcpServer.h>
#include<muduo/net/EventLoop.h>
#include<muduo/net/TcpConnection.h>
#include<muduo/net/Buffer.h>
#include<iostream>
#include<string>
#include<unordered_map>

class DictServer
{
public:
    DictServer(int port)
        :_server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port), "DictServer", muduo::net::TcpServer::kReusePort)
    {
        //设置连接事件的回调（建立、管理连接）
        _server.setConnectionCallback(std::bind(&DictServer::onConnection, this, std::placeholders::_1));
        //设置消息的回调
        _server.setMessageCallback(std::bind(&DictServer::onMessage, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
    }

    void start()
    {
        _server.start(); //先开始监听
        _baseloop.loop(); //开始死循环时间监听
    }

private:
    void onConnection(const muduo::net::TcpConnectionPtr& conn)
    {
        if(conn->connected())
        {
            std::cout<<"连接建立！\n";
        }
        else
        {
            std::cout<<"连接断开！\n";
        }
    }

    void onMessage(const muduo::net::TcpConnectionPtr& conn, muduo::net::Buffer* buf, muduo::Timestamp)
    {
        static std::unordered_map<std::string, std::string> dict_map = {
            {"hello", "你好"},
            {"apple", "苹果"},
            {"world", "世界"}
        };
        std::string msg = buf->retrieveAllAsString();
        auto it = dict_map.find(msg);
        std::string res;
        if(it != dict_map.end())
        {
            res = it->second;
        }
        else
        {
            res = "未知单词";
        }
        conn->send(res);
    }
private:
    muduo::net::EventLoop _baseloop;
    muduo::net::TcpServer _server;
};

int main()
{
    DictServer server(9090);
    server.start();
}
